Abstract: A fluid injector system for use in tank cleaning is provided, the injector system including an injector head block housing two disc-shaped injectors which may be rotated inside of the injector head block to change the orientation of bores extending through the disc-shaped injectors, which discharge pressurized fluid therethrough. The injector head block depends downwardly from a housing, and is rotatable relative to the housing by rotating a drive tube assembly housed partially within the housing and connected to the injector head block. The disc-shaped injectors are rotated by a vertical movement of the injector head block by virtue of a linkage assembly linking the injectors to a portion of the structure that is vertically stationary when the injector head block is moved vertically.

Abstract: A knockdown tank-cleaning apparatus that is easily broken down and reassembled is provided. The tank-cleaning apparatus, when knocked down, easily fits through a standard man-way opening in the side of the tank. The tank-cleaning apparatus includes a knockdown frame having wheels releasably attached thereto. A header assembly is releasably attached to the front of the knockdown frame. The header assembly includes a cutter head releasably and rotatably disposed in the header assembly. The header may optionally include a throat portion, in which a cross-chopper assembly is disposed. Bottom-deposited materials are broken up by rotation of the cutter head. The loosened material is fed to the cross-chopper assembly where it is further reduced and formed into a slurry. The slurry is pumped from the tank to the exterior of the tank where reclamation of valuable materials from the slurry is performed.

Abstract: A guidance system and method for positively guiding a tank sludge-removal unit or the like around the inside of a tank, including a plurality of winch assemblies mounted at radially spaced locations on the top perimeter of the tank each having a control line which extends into the tank for connecting either directly to the unit or indirectly to a lifting line via a pulley device used for raising and lowering the unit within the tank, thereby enabling the position and/or the direction of movement of the unit to be positively controlled by selective operation of the winch assemblies and/or lifting line. A line-forwarding device is also provided for use in forwarding control lines of the winch assemblies to an access opening in the tank.

Abstract: A dragline apparatus for cleaning waste material and sludge in clarifier and settling ponds and lagoons includes a pair of side walls and a back wall forming a frame supported on front and rear flotation rollers. Between the home member is at least one blade, pivotally mounted for swinging movement from an active to an inactive position. Cables are connected to the front and rear of the frame and to prime movers on the banks of a pond to be cleaned.